Electrically-influenced timing device



Aug. 14, 1923. 1,464,951

H. H. MCINTIRE ELECTRICALLY INFLUENCED TIMING DEVICE Filed Nov. 22. 1920 2 Sheets-Sheet 1 Her/6y /2. 724x622??? INVENTOR.

A TTORNE Y.

Aug. 14, 1923. 1,464,951

H. H. McINTlRE ELECTRICALLY INFLUENCED TIMING DEVICE Filed Nov. 22, 1920 2 Sheets-Sheet 2 IN VEN TOR.

A TTORNE Y.

men-ta Au 14, 1 923, 1 5

v .nnnvnfnsnqmrrnn, or sou'rirnnnn, :IN-IQJIIANA. 1

Er;Ee'rmcALIlY-inrLUENonn 'ri InG nnvron;

Applicaitiim filed Noiiem ber 2 2 11920. Serial No. 425,930,.

7 '0 all who nt it ina zfc'on cern j Be itknoivn that I, 'Hnnv ill; Molnrrinn, a citizen of. the United] States, residing at South Bend, in the vcounty. of 'Stl Joseph and State of Indiana, have-invented certain I I neiv and useful Improvementsin'fElectri-' Cally-Influenced Tim 'ing D'eVices QoZt} which the follovvingisaspecificationf i indicating iTheii il ant i fie fie o t m 10 posure of photographic ;pri nts,-and isimore especially adapted tor use'in connectionjvith photographic machines; a v l mi n i jhe i er s ec P vide a gClQVlCB of this character for: uselineesfor exposing. printsr' vvhich arew on v commercial circuits the voltage f yvhich" fluctuate more;or less in accordance with the load'on 1 the circuits at difierent; times, as influenced, is for instance, by the [cutting iniand out of the line of motors for driving'he'afvy machinery,

I elevators, etc, The primary object is to providea circuit controlledtiming device Whereby, afterestablishing theproper period of exposure to produceithefdesired'tone value in a print under, normal condition or voltage of the circuit, success ve prlntsvmay beeasily produced having the same toneJVahie, By {the fluctuation of the voltage, at which time the rays of the lamp become either vveaker or 'st-ronger exposure of the pr n er the same periodas under normal voltage would result, n either an under orgover exposure in Assuming forexample that'glthe indicated} time periods would begten in, number, as;

y he"t p elof belt-W c ayb the Qdesired; to 1 produce gman'y prints} of uniform atone value." ;Ij ;in processg ofuexposing the solenoid which is; in alight circuit.

so far as obtaining uniform tone-'evalues;in-

claimed ithout equivalent of ten, seconds i s found tobe the V p ep r-wl at o x fi-exposgr ri r 'Qbta n ipg the desired tone value in a print, andit is" timing device, owing to hein directly in fi'uenced by thevoltage', would operate but measured out, and uniformity oftone value p p A r obtained as under' inormalff voltage. The j devices for determining the durationfof exsame condition vvould obtainif the Voltage as to actually require twenty seconds of exp posure to obtain the sametone value, the

should rise abovefnormaliin which case the timing device would operate'more'rapidly, and, there Wouldbe'a' proportionately short- Y I er interval between the indicated periods.

a I I p M Once the proper duration of exposurei is astablishments which employ ielectrlcdamps value in successive prints regardless of the fected by the fluctuation of the voltage,

A further object is'to provide a circuit.

making and f breaking device comprising a frame having mounted thereon a shaft on the ends of which discs are'se'cured, one of said discs being linked to a solenoid core and adapted to be partially rotated by said The disc is provided with a lug which. contacts vicejwill represent the proper duration of exposure forfobtaining uniformity of tone variation in the "power of the lamp as af, 1 i Q I with an arm of apivoted contact member and adapted to engage saidar nland cause" the pivoted contact member to move from side to side for making or breaking'the ,cir-

cuit, The disc on the other end of the shaft provided With-weight members ior varyingthe' speed of rotation th'ereof, and also provided with spring arms playing between stops'andformingnieans for reversing the rotation of the disc. V vWith the above and other objects inview,

the invention resides in the combination and arrangement of parts as hereinafter set forth, shown in; the drawings, described and clalmed, it being understood that changes in, the precise embodiment of the invention a may be made within the scope of what is of theiinventionf v v In the drawings; t,

Figure 1 is a frontelev I Figure 2'jis fa ,side elevation; V

, Figure '18- a l af le vafiO -i f l "Referring to the drawin the letter A designates a switchfused or opening and lclosing a circuit A'.; Upo1i the' closing {of V departing trom the stain of the devicej the switch A the circuit A, which is a commercial circuit having a fluctuating voltage, the lamp B comes on for exposing a print. The circuit A being closed, the solenoid G is momentarily energized, the current passing through the lead D, the fixed contact E and a make and break switch F, which switch has its contact point G in electrical connection with the hook through a wire H, then through the switch controlling spring J which. has one of its ends connected to the hook I and its other end connected to the hook I oil? the bracket K, said bracket K having connected thereto a lead H which leads to the solenoid C. The other side of the solenoid C is in circuit with the light circuit A through the lead wire L. As the solenoid is energizer, its core is drawn in and imparts a limited rotative movement in one direction to the disc M. The disc M is provided with an inwardly extending pin N, which pin during the movement of the disc M the linger O of the pivoted switch member F, thereby causing said member to move n itspivotal point F to the dotted line position shown in Figure 1, and as the pivotal point F passes through the pivotal points of the spring J, the finger O strikes a bell P, each tap of which represents a period of time. It will be seen that the pivoted switch member will be held in either closed r open position by the spring J, as said spring' J passes to either side of the pivotal point F. 4

Disc M is carried by a shaft M, which is rotatably mounted in a supporting bracket C" and is connected to the core by means of a link C Secured to the other end of the shaft M is another disc Q, on which disc is pivotally mounted an adjustable arm R, the outer end of which is bent to overlie the periphery of the disc Q, and ex tend inwardly sufliciently onits rear side to allow the arm R to be securely'clamped in any position on the disc, after. it has been adjusted. by means of a set screw S. which binds the outer end of the arm on the edge of'the disc. Said'arm has secured thereto as at R spring lingers S and S which lingers engage stops T and T. Stop T is a stationary stop and is carried by the support C and stop T is an adjustable stop and is carried bya pivoted arm T by the movement of which arm T the relation of the stop to the spring arm S may be varied. As the solenoid momentarily energized and the core C pulled downwardly therein, the finger S contacts with the stop '17, thus arresting the movement of the disc Q, and in so doing said spring finger S becomes flexed and the solenoid de'energizedby the contact of the pin N with'the finger O of the pivoted switch F, which is thrown to the dotted line position shown in Figure 1. The reflex ac tion of the spring finger S then causes the measured out in said time period.

be substantially obtained.

could not be understood whypapercoated disc Q to reverse its movement 'andthe linger S moves around until it strikes the stop T, atwhich time the spring finger S is flexedand then sets up a reflex action so that, under the influence of the solenoid and the action of the spring fingers, the disc Q is oscillated, and each period of time in such movement is indicated by the striking of the bell. It will'be seen that as the disc Q is oscillated in the direction of the arrow A, under the reflex action of the spring finger S, that the pin N will engage the finger O oi the pivotedswitch member-F and cause the contact point G t again engage the lined contact E, thereby momentarily closing the circuit. The pivoted arm R is provided with an inwardly and outwardly adjustable weightll and an inwardly and outwardly adjustable weight U is provided at the opposite side of the disc Q, by means of which weights and the adjustable stop T, the device may be made to operate slow or fast according to the voltage of the current employed as may be required for the best operating speed. 7 v

Assuming that it would require under normal conditions of voltage a period of exposure oi the print equal to and indicated by ten time periods represented by a 'strilo ing of the bell in order to produce and reproduce a certaintone value. In order to obtain such tone value, the sensitized or developing paper must be influenced by expo sure to the actinic rays of the light of a given quantity, and which is found to be As the actinic rays given off by the light would vary in quantity within 'a given time owing to a fluctuation of the voltage increasing or decreasing the powerof the light, it is evident that, unless such indicated time periods would also vary bya faster or slower opera tion of the timing deviee,-that the desired quantity of actinic rays would not be ac curately measured or indicated, and an over or under exposure would result. As the device in its operation is influenced by the same current and voltage as the lamp, the time periods will fluctuate with the fluctuation'of thevoltage, and uniform results can I Ieretofore it with the same emulsion and given the same time exposure by the use of a time piece would not produce uniform tone value, because it was not recognized 'thatrthepower of the lamp varied With the voltage, and it is for this reason that time pieces and timing devices heretofore provided are not prirctica'l and have not given the desired resu t.

The invention having been 'se't forth what is claimed asnew and us'efulisz l. The combination with a photographers exposure light circuit having a fluctuating I vo1tage, of means for 'controll'in fsaid circuit whereb successive circuit 0 osin o v erations will fluctuatein time according to." the fluctuation of the voltage'ofthe circuit, and signalling means for indicating the suecessive circuit" breaking operations.

2. The combmation with a lightlng circuit having a fluctuating voltage, of a ClICIIit.

maker and breaker therefor, said circuit maker and breaker comprising a frame having rotatably mounted therein a shaft, discs carried by the ends of the shaft, one of said discs beingprovided with a linkconnection with a solenoid, said solenoid being adapted to partially rotate said disc, a pivoted switch carried bythe frame, means carried by the disc for moving said switch into and out of operative position with a con-tact, said contact and solenoid being in circuit with the lightingcircuit, adjustable spring arms carried by the disc at the other end of the shaft, said sprin arms playing between stops,

means for adjusting said spring arms to different positions, said spring arms form: ing means for reversing the direction of rotation of the disc, and adjustable weight members carried by one of the discs for adjusting the time of oscillation.

3. In a lighting circuit having a fluctuating voltage, a circuit maker and breaker comprising a frame, a shaft rotatably mounted in said frame and provided with discs, a solenoid carried by the frame and having a link connection with one of the discs, a pivoted switch carried by the frame and provided with fingers, a lug carried by one of the discs and adapted to engage said fingers for swinging said switch out of engagement with the contact and into engagement with a bell, spring means for holding said switch in both positions, stops carried by the frame adjacent the other disc and spring arms carried by said last named disc and playing between said stops and form'- ing means for reversing the direction of ro' V tation of the discs.

' tion of rotation of the disc, means for. vary a contact and alarm disposed above one of said discs and spaced apart, a pivoted spring controlled swltch disposed between the contact and the alarm, means carried by 'thesolenoid controlled. disc for shifting the switch into engagement with the contact or with the alarm, adjustable spring arms car ried by the other disc, said spring arms playing between stops carrled by the frame and forming means for reversing the direcing the distance between said stops for ad- I justing the time of reversaland adjustable tial rotation of the disc in one the'time of reversal.

ing voltage, a circuit 'ma-ker and breaker comprisingsimultaneously rotatable discs, a solenoid for imparting a partial rotatlon to said discs, a spaced contact and signal adjacent one of said" discs, a pivoted spring controlled switch disposed between the contact and signal, means carried by one of the discs for throwingsaid switch into engagement with the signal and into engagement with the contact and spring means carried by one of the discs for reversing the direction of rotation of the disc after signalling periods and, circuit closing periods.

6. Ina lighting circuit having a fluctuating voltage, a circuit maker and breaker comprising simultaneously rotatable discs, a solenoid for imparting a partial rotation to said disc, a. contact and slgnal adjacent one of the discs and spaced apart, a pivoted switch between the contact and signal, spring means for normally holding said switch either in engagement with the contact or with the signal means carried by one x of the discs for shifting the switch from the contact to the signal on' a partial rotation of the dlsc in one directlon, spring means carried by one of the discs and playing becomprising a pivoted switch, said switch being disposed between a contact and a signal, spring means for normally holding the switch either in engagement withthe con-v tact or the signal, means for shifting said switch from engagement with the contact and .into engagement with the signal, vice versa, said means comprising a rotatable disc having thereon means for engaging the switch upon the oscillation of the disc,

spring arms rotatable with the disc and playing between stops and forming means for reversing the direction of oscillation of the disc and'weight means for varying the speed of rotation of the disc, for varying the time of shifting of the pivoted switch.

8. In a lighting circuit having a fiuctuating voltage, a circuit maker and breaker comprising a .pivoted'switch disposed between a cont-act point and a signal and held 5. In a lighting circuit having a fluctua't inengagement with one or the other by means of a spring, means for shifting said switch from the contact to the signal or vice versa, said means comprising a rotatable disc, electrical means for impartiraga parrection,

said disc being rovided with means for shifting the swltc for engagement with the signal, and out of engagement with the Contact, spring arms carried by a second disc and playing between stops, one of said spring arms being positioned to reverse the direction of rotation, the other spring arm forming means for reversing the direction of rotation of the disc at the other end of its partial rotatioinineans for adjusting said 10 stops in relation to each other, and Weight means .for arying the speed of rotation of the disc during its oscillation.

In testimony whereof I afiix my signature.

HERVEY H. MoINTIRE. 

